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platform/x86: touchscreen_dmi: Add EFI embedded firmware info support 

Sofar we have been unable to get permission from the vendors to put the
firmware for touchscreens listed in touchscreen_dmi in linux-firmware.

Some of the tablets with such a touchscreen have a touchscreen driver, and
thus a copy of the firmware, as part of their EFI code.

This commit adds the necessary info for the new EFI embedded-firmware code
to extract these firmwares, making the touchscreen work OOTB without the
user needing to manually add the firmware.

Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200115163554.101315-10-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2020-01-15 17:35:53 +01:00 committed by Greg Kroah-Hartman
parent 85bfb4af14
commit 835e1b86ef
4 changed files with 46 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/firmware/efi/embedded-firmware.c
View File

@ -21,6 +21,9 @@ EXPORT_SYMBOL_GPL(efi_embedded_fw_list);
static bool checked_for_fw;
static const struct dmi_system_id * const embedded_fw_table[] = {
#ifdef CONFIG_TOUCHSCREEN_DMI
touchscreen_dmi_table,
#endif
NULL
};

1
drivers/platform/x86/Kconfig
View File

@ -1252,6 +1252,7 @@ config INTEL_TURBO_MAX_3
config TOUCHSCREEN_DMI
bool "DMI based touchscreen configuration info"
depends on ACPI && DMI && I2C=y && TOUCHSCREEN_SILEAD
select EFI_EMBEDDED_FIRMWARE if EFI
---help---
Certain ACPI based tablets with e.g. Silead or Chipone touchscreens
do not have enough data in ACPI tables for the touchscreen driver to

41
drivers/platform/x86/touchscreen_dmi.c
View File

@ -11,12 +11,15 @@
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/efi_embedded_fw.h>
#include <linux/i2c.h>
#include <linux/notifier.h>
#include <linux/property.h>
#include <linux/string.h>
struct ts_dmi_data {
/* The EFI embedded-fw code expects this to be the first member! */
struct efi_embedded_fw_desc embedded_fw;
const char *acpi_name;
const struct property_entry *properties;
};
@ -64,6 +67,15 @@ static const struct property_entry chuwi_hi8_pro_props[] = {
};
static const struct ts_dmi_data chuwi_hi8_pro_data = {
.embedded_fw = {
.name = "silead/gsl3680-chuwi-hi8-pro.fw",
.prefix = { 0xf0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00 },
.length = 39864,
.sha256 = { 0xc0, 0x88, 0xc5, 0xef, 0xd1, 0x70, 0x77, 0x59,
0x4e, 0xe9, 0xc4, 0xd8, 0x2e, 0xcd, 0xbf, 0x95,
0x32, 0xd9, 0x03, 0x28, 0x0d, 0x48, 0x9f, 0x92,
0x35, 0x37, 0xf6, 0x8b, 0x2a, 0xe4, 0x73, 0xff },
},
.acpi_name = "MSSL1680:00",
.properties = chuwi_hi8_pro_props,
};
@ -181,6 +193,15 @@ static const struct property_entry cube_iwork8_air_props[] = {
};
static const struct ts_dmi_data cube_iwork8_air_data = {
.embedded_fw = {
.name = "silead/gsl3670-cube-iwork8-air.fw",
.prefix = { 0xf0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00 },
.length = 38808,
.sha256 = { 0xff, 0x62, 0x2d, 0xd1, 0x8a, 0x78, 0x04, 0x7b,
0x33, 0x06, 0xb0, 0x4f, 0x7f, 0x02, 0x08, 0x9c,
0x96, 0xd4, 0x9f, 0x04, 0xe1, 0x47, 0x25, 0x25,
0x60, 0x77, 0x41, 0x33, 0xeb, 0x12, 0x82, 0xfc },
},
.acpi_name = "MSSL1680:00",
.properties = cube_iwork8_air_props,
};
@ -387,6 +408,15 @@ static const struct property_entry onda_v80_plus_v3_props[] = {
};
static const struct ts_dmi_data onda_v80_plus_v3_data = {
.embedded_fw = {
.name = "silead/gsl3676-onda-v80-plus-v3.fw",
.prefix = { 0xf0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00 },
.length = 37224,
.sha256 = { 0x8f, 0xbd, 0x8f, 0x0c, 0x6b, 0xba, 0x5b, 0xf5,
0xa3, 0xc7, 0xa3, 0xc0, 0x4f, 0xcd, 0xdf, 0x32,
0xcc, 0xe4, 0x70, 0xd6, 0x46, 0x9c, 0xd7, 0xa7,
0x4b, 0x82, 0x3f, 0xab, 0xc7, 0x90, 0xea, 0x23 },
},
.acpi_name = "MSSL1680:00",
.properties = onda_v80_plus_v3_props,
};
@ -449,6 +479,15 @@ static const struct property_entry pipo_w2s_props[] = {
};
static const struct ts_dmi_data pipo_w2s_data = {
.embedded_fw = {
.name = "silead/gsl1680-pipo-w2s.fw",
.prefix = { 0xf0, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00 },
.length = 39072,
.sha256 = { 0xd0, 0x58, 0xc4, 0x7d, 0x55, 0x2d, 0x62, 0x18,
0xd1, 0x6a, 0x71, 0x73, 0x0b, 0x3f, 0xbe, 0x60,
0xbb, 0x45, 0x8c, 0x52, 0x27, 0xb7, 0x18, 0xf4,
0x31, 0x00, 0x6a, 0x49, 0x76, 0xd8, 0x7c, 0xd3 },
},
.acpi_name = "MSSL1680:00",
.properties = pipo_w2s_props,
};
@ -641,7 +680,7 @@ static const struct ts_dmi_data trekstor_surftab_wintron70_data = {
};
/* NOTE: Please keep this table sorted alphabetically */
static const struct dmi_system_id touchscreen_dmi_table[] = {
const struct dmi_system_id touchscreen_dmi_table[] = {
{
/* Chuwi Hi8 */
.driver_data = (void *)&chuwi_hi8_data,

2
include/linux/efi_embedded_fw.h
View File

@ -36,6 +36,8 @@ struct efi_embedded_fw_desc {
u8 sha256[32];
};
extern const struct dmi_system_id touchscreen_dmi_table[];
int efi_get_embedded_fw(const char *name, const u8 **dat, size_t *sz);
#endif